MULTI-RECASTABLE TICKET SCHEMES FOR ELECTRONIC VOTING

Multi-recast techniques make it possible for a voter to participate in a sequence of different designated votings by using only one ticket. In a multi-recastable ticket scheme for electronic voting, every voter of a group can obtain an m-castable ticket (m-ticket), and through th e m-ticket, the voter can participate in a sequence of m different des ignated votings held in this group. The m-ticket contains all possible intentions of the voter in the sequence of votings, and in each of th e m votings, a voter casts his vote by just making appropriate modific ations to his m-ticket. The authority cannot produce both the opposite version of a vote cast by a voter in one voting and the succeeding un cast votes of the voter. Only one round of registration action is requ ired for a voter to request an m-ticket from the authority. Moreover, the size of such an m-ticket is not larger than that of an ordinary vo te. It turns out that the proposed scheme greatly reduces the network traffic between the voters and the authority during the registration s tages in a sequence of different votings, for example, the proposed me thod reduces the communication traffic by almost 80% for a sequence of 5 votings and by nearly 90% for a sequence of 10 votings.